Cavity ring for a disc-molding die



FIG. 1 is a perspective view of a cavity ring for a disc-molding die;

FIG. 2 is a front view thereof, a rear view, a right side view, and a left side view being the same as the front view;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom view thereof. 

The ornamental design for a cavity ring for a disc-molding die, as shown and described. 